Renormalization theory of the interacting Bose fluid
R. J. Creswick, F.W. Wiegel
We derive an approximate closed form for the infinitesimal generator of the renormalization group for the interacting Bose fluid. The Bose-condensed phase is treated by the method of Bogoliubov, and a simple scaling law is found for the condensate density. It is shown that the quantum-mechanical features are irrelevant close to the $\ensuremath{\lambda}$ line. This is demonstrated by calculating the critical behavior in $4\ensuremath{-}\ensuremath{\epsilon}$ dimensions to order $\ensuremath{\epsilon}$.
Physical Review A•Sep 1, 1983•22 citations